SYNTHESIS METHOD OF CATHODE COMPLEX MATERIAL FOR LITHIUM BATTERIES FOR ELECTROVEHICLE AND METHOD OF MAKING ELECTRODE OF THE LITHIUM BATTERIES

摘要

PURPOSE: A manufacturing method of a positive electrode active material provides a positive electrode active material with high capacity, high energy density, and high safety. CONSTITUTION: A manufacturing method of a positive electrode active material for a lithium secondary battery mixes a complexing agent into a starting material solution mixed of nickel nitrate solution, manganese nitrate solution, and cobalt nitrate solution and synthesizes a Li2MnO3-based composite material: Li(LixNiyCozMnwO2) by a coprecipitation method. The starting material solution is mixed of Ni(NO3)2·H2O, Mn(NO3)2·H2O, and Co(NO3)2·H2O with a molar ratio of 1:4:1. The complexing agent uses ammonia solution, and 0.8 mol of the complexing agent is mixed into the starting material solution. The amount of lithium used in the composite material is 0.20-0.60. [Reference numerals] (AA) Titration speed (10mL/min); (BB) Titration speed (8mL/min); (S1) Starting material solution; (S2) Complexing agent solution; (S3) Adjusting pH; (S4) Stirrer (1M NaOH solution); (S5) Wash/dry precursor; (S6) Employ/composite the precursor; (S7) High capacitance anode material powder (Li(Li_x Ni_y Co_z Mn_w O_2))